Dun Canoein

I pick up my new Sunsation 32SS next week-end (Joe permitting!!). The engines are 525's and I would like to know the oil that will provide the best engine life. Synthetic or is it better to go with Mercruiser?
Dun

mr_velocity

Looooonnnnnng oil thread in the Tech section. My preference is still RedLine.

Downtown42

Use the factory oil 25/40 till your warranty expires.

Dun Canoein

Thanks guys....I'll take a look at the thread in the tech section.

Hydrocruiser

If you can afford Redline at around $11.00/qt it is a great fully ester based oil. The only thing some do not like about it is the rather high silicon levels. It's detergency is extreme to say the least.

For a new engine run 25W-40 it came with for 20 hours...then go to a 15W-50 or 20W-50 synthetic.

Magic Medicine

Break it in on mineral oil then change to synthetic. I would run mobil 1 or amsoil.

Dun Canoein

Hydro, Magic.........thanks for the advice.
Dun

mr_velocity

I switched from Redline to M1 for a very brief time, on long hard runs my oil temp was 20 degrees hotter. Switched back and the temp dropped back to normal. Same on both motors.
You can draw your own conclusions as to which is the better oil.

Hydrocruiser

My only concern about Redline is that most of the guys on Bob's site show increased wear metals when they switch to Redline.

So a lot mix it 50/50 with a PAO of equal viscosity.

The 50/50 mix of 20W-50 Redline with M-1 20W-50 V-twin is worth a go I would think.

Redline does have a lot of moly in it as well and it is a "slick oil" ...if anything might cause flat-topping I would bet this would be the one to show it most.

Additionally, as it is quite "slick" there is less friction and heat. The question that remains is "how slick is too slick"?

I don't know the answer...

FeverMike

Gary, you still have the 41 Velocity with Teague engines?